Cushioning device for automatic dilution-valves in carbureters.



En 4, mos.

GUSH VALVES IN MRETERS APPLIGATIQH 1ILE D=JA N.15,11'Q07.

mi A M mi fi i i. i s", Q1' licheni/inf@ Specification of :Letters f'atent.

pplication filed January 15,1907. Serial lio, 352359.

To @ZZ 07mm it may cammini:

' {noun th at l Aniirr; in irirn LONGUE- (ne Lnonnsrrng a citizeness ol the 'euch "teiuhlic, and residing at Paris, in luivc invented certain new and u Vuiouing Device for Automatic Di ution-Q'a-lifcs in Carliureters, oi which the 'foliowing is a s peciioaticn.

This invention rel ates to a pneumatic cushinningY device, applicant@l generally to any movable part capable of being violently more under the action of n Variation of pressure, this de v'icing incre loarticularlyv designed for use 'ior the automatic regulation oil the admission of supplementary air in the explosion engines.

ln the accompanying drawing, given merely hy Way exams f, Figure 1. is i` vertical sec tion through the carburetor oi an explosion. engine, provided With a cushioning device according Vto the present invention. Fig. 2 plan of the essential nicniher constituting this invention. Fig. 3 is a partial eli. nation ot the bottoni air-inlet nozzle. Fig. 4 is a incuirled construction.

ls, this pneumatic cushioning` dein prit. Y

consists or" a hollow piston of constant f acitj, provided at lioth its ifa-ces with holes of adjustable area, thosaid piston inoving, under the action of a pressure applied externally to its rod, in a closed cylinder, also or const-unt capacity, so as to make the air forced or below the said piston7 to into chanihi-us of variable vol i the construction shown in Fig l to 3A o suon o. devi applied, 'by Way of exemple, to the cidoiuaiic resiliation ofthe. adnussion n u n onal nir to an explosion engine, the

rcito"vr piston c is arranged in n completely cvA ndrical cody o to the interior ol i dit cap c. This hollow piston a. is proon its two faces with a certain nuinhci und rlhe holes d oi the upper con la partly." or entirely, closed oy a ino; alle dislr` l: held its conter against the said taco hy means oi a nut which is screwed to the end ci' central rod fpassing through the bottoni cover of the cylindrical body li.

. The said rodfis connected to a cylindrical sleeve or hanged disl; g sliding with a slight amount ol 'friction in another cylindrical hotly it arranged in line .with the piston c and open at the hottoin.- The sleeve g is, provided with a cover preventing any'v air from getting in through the open ot' the cyl o A 1 l access cnn gained hy means ol' an inder 7L, and its oyliinh'ical Wall or flange is with openings i which cooperate. dowr` j inode in the Wall oi the said cylinder h.

The openings i and j are arranged so that they coincido when 'fully open, that to when the hollow piston c is at the top of its upstroke. Y

lt is these openings i and which in the application illustrated afford passage to the additional air intended to insure automatic iiforliing of thc cushioningdevice.

A projection L', secured to the sleeve c, slides in a longitudinal groove 0 of the cylindrical body 71,. This projection insures vertical guiding oi the `whole mechanism constituted hy the hollow piston c, the rod and the sleeve-vulve g.

Through thc chamber of hotly h passes horizontally a jp of' which one. oi' tic ends branch 'my throui `i which arri sive mixture coming from the carburetor, the other end ot the said pipe p opening into the branch n for the inlet oi the said mixture to the engine.

The working is as followsz-lllhen the engine is working srt high speed strong devpression is produced in the branch n, sind consequently in the chamber ot the oylir zer h, the said depression acting strongly on the sleeve val e g which is caused to and in crease the section of the inlet i and i tional air. l The jerky niovcnients, genera 'produced in automatic valves or other dem .es regu latingy the admission of additional air7 are avoidex'l by this new device? owing to the i cushioning,v action. of the air, which cannot pass througc the hollowpiston uv except with. a speed depending on. the section or the 'passage left lijf the holes r] and e, the ini/arialilc capacity of the hollow piston a, serving as moderator to the inoifeinents o'l the said piston during thc circulation of air troni one oi the chambers of the cylinder l) into the other chanihcr.

e is regulated once for all in accordance with the power oi the engine to which the device is applied.

iWhen depression Varies in the cylindricai body h, either owing to a change oit spoed the engine, or to the butter'ly Valve i lacing j available 'for the admission of the addi- The cross-sectional area oi the holes d and l operated so to throttle or increase mission of the mixture to the engine, it. follows that the travel ofthe sleeve-valve g is varied" to a corresponding extent, and the hollow piston (L is moved with variable energy, 1n such manner that the jerky movements which might take place owing to variable depressions, are compensated by the cushio'nlng action caused by the circulation of air through the chamber of the hollow piston e.

The holes tmade in the cylinderh and uncovered when the engine is working at a small speed, serve to'avoid condensation of the petrol owing to the small draft of air produced.

In the construction shown in Fig. 4, the rodf is done away with and the hollow piston c is connected direct to the sleeve g. ln this case, theguovable disk 7c serving to regulate the passage of air through the holes d is mounted on a small spindle preferably provided wit-h a milled head g or with a screw. The regulation of the said holes d is eiiected by hand as before, after having unscrewed the air-tight cap c.

When ap lied to an explosion engine, a cushioning device according to the present invention enables homogeneity of the mixture to be assured by the su pression ofthe shocks in the movements of t e additional air inlet valve whatever be the speed of the engine.

What l claim as my invention and desire to secure by Letters Patent is- 1. In a device of the character described the combination with a member movable by variations of' pressure, of a closed cylinder, a hollow piston in said cylinder and provided in each face with a plurality of holes, and an operative connection between said piston and said member.

2. ln a device of the character described the combination with a member movable by -variations of pressure, ot' a closed cylinder,

a hollow piston in said cylinder and provided in'eacrh face with a plurality of holes, adjustable means to vary the total'area o1" saidholes and an operative connection between said piston and said member.

3. In a device of the character described the combination. with a member movable by variations of pressure, of a closed cylinder, a hollow piston in said cylinder and provided in each face with a plurality olt holes, adjustable means to close one of said holes and an operative connection between saidpiston and said member.

4. ln a device of the character described the combination with a member movable by variations oi pressure, of a closed cylinder, a hollow piston in said cylinder and provided in each face with a plurality of' holes, adjustable means to close any desired numberof said holes and an operative connection between said piston and said member.A

5. In a device of the character described the combination with a member movable'by variations of pressure, of a closed cylinder, a hollow pistonin said cylinder and provided in each face with a plurality of holes, a disk of smaller diameter than said piston Aapplied to one face thereof for the purpose described, and an operative connection between said piston and said member.

6. The combination of a closed cylinder, a hollow piston therein provided in each face with a plurality of holes, a cylindrical body in line with said cylinder and provided in its wall with holes, a flanged disk movable lengthwise but not rotatable, in said cylindrical body the flange of said disk being provided with holes and the holes in the cylindrical body being so arranged as to correspond with the iange holes at one position of the flange relatively to the said body, and a piston rod connecting said piston and flanged disk.

7 .ln a device of the character described the combination of a closed'u cylinder, a hollow piston therein provided in each face with a plurality of holes, adjustable means to vary the total area of said holes, a cylindrical body in line with said cylinder and provided in its wall with holes, a flanged disk movable lengthwise but not rotatable in said cylindrical body, the ilange of said disk being provided with holes, the holes in the cylindrical body being so arranged as to correspond with the flange holes at one position of the .flange relatively to the said body, and a piston rod connecting said piston and flanged disk.

ln testimony whereof l have signed my name to this specification in the presence oi' two subscribing witnesses.

Attimi nuttin timmerman.

Witnesses:

Il. C. Conn, GEORGES BoUNEsUL. 

